Coil forming press



July 10, 1951 w. s. RQYSTON con. FORMING PRESS Filed March 21, 1947 jinemar Patented July 10, 1951 UNITED STATES PATENT OFFICE WorlcyGrantRoyston, Logan, W. Va. Application March 21, 1947, Serial No.736,369

This invention relates to a coil-forming press.

In the winding of armatures and stators for rotary electrical machinery,as well as in the making of transformer coils, it is usually desirableto have the coil of square cross-section. The coil must be fitted in theslots in the armature or stator laminations, which slots are usually ofsubstantially rectangular cross-section, and the coils are designed tofit with close'tolerances. This is particularly the case where severalcoil sections are to be placed in the same slot.

The object of the present invention is to provide a coil-forming presswhich will apply pressure. to a coil section and form same into a squarecross-section.

It is another object of the present invention to provide a coil-formingpress which will apply pressure to the sides of a coil simultaneously infour directions to form same into a perfect square.v 7

It is a further object of the present invention to provide acoil-forming press into .which'the coil may be readily inserted and fromwhich they may be readily'removed so as to facilitate the forming ofcoils on the mass production basis.

Still other objects, advantages, and-improvements will become apparentfrom the following specification, taken in connection with theaccompanying drawings, in which:

Figure 1 is a fragmentary side elevational view, partially in section,of a coil-forming press according to the present invention;

Figure 2 is a top plan view, partly broken away;

Figure 3 is a perspective view of a coil formed in the coil-formingpress according to the present invention.

Referring now to the drawings in detail, and to Figure 1 in particular,the coil-forming press is here shown as comprised principally of a bodyIn supported on a standard I I. The body In has an inclined top face 12and a downwardly and inwardly inclined face 13 at right angles thereto.Side plates l4l4 are mounted on the body by any suitable means, such asscrews (not numbered). A plate [5 is adapted to slide along the inclinedtop face I2 of the body I0, this plate being biased upwardly by a coilcompression spring [6. The spring H5 at its lower end abuts an end plateI! which is secured between the side plates l4l4 in any suitable manner,as by screws (not numbered). A plate I8 is positioned over the plate l5and at its outer end has an upturned toe flange I9. The plate I8 isadjustable along the inclined top face l2 of the body by a screw 22which'has its head 20 3 Claims. (Cl. 100-70) mounted in a shallow notchin the lower edge of the plate and secured in position by a strip 2|fixed to the lower edge of the plate in any suitable manner, as bybrazing or welding. The screw 22 is mounted in a threaded hole in theend plate Hand has a knob 23 at its outer end. Over the top of theadjustable plate it there is mounted a guide plate 24 which is held inplace in any suitable manner, as by screws (not numbered) extendingthrough the side plates I4I4.

A forming head 25 has a shank 35 which extends along the rear face ofthe body I0, this shank preferably being of the same width as the bodyand being constrained to vertical movement by the rear face of the body,a back plate 34, and the side plates l4l4 to which the back plate issecured in any suitable manner, as by screws (not numbered). The forminghead 25 has an inclined top face 26, which is parallel to the inclinedtopface I2 of the body in, and an inclined face 21 which is downwardlyand inwardly inclined, at right angles to the top face 26 and parallelto the upwardly inclined top face l3 of the body ID. A plate 28 havingan upturned toe flange 29 is mounted on the inclined surface 26 of theforming head. The plate 28 is constrained to sliding movement by a guideplate so which is mounted on the forming head 25 in parallelrelationship to the inclined surface 26 thereof and held in place byside plates 3l3l, suitable screws (not numbered) extending through theside plates and into the forming head and the guide plate. A coilcompression spring 32 biases the plate 28 downwardly, this spring beinginterposed between the upper edge of the plate and an end plate 33 whichis likewise held in position by suitable screws (not numbered) extendingthrough the side plates 3|-3I.

A pair of parallel arms 36-36 extend downwardly and rearwardly from thebody It). On these parallel arms there is pivoted at its outer end afoot or hand treadle 39 by a bolt 37 having a nut 38 thereon. The lowerend of the shank 35 is bifurcated and fits on both sides of the treadle39. The treadle 39 has a longitudinal slot 40 therein and a pivot pin 4!is fitted through the lower bifurcated end of the shank 35 and the slot40, this slot 40 allowing for differences in the direction of motion ofthe pivot pin ti whether considered as a point on the shank 35 havingstraight line vertical motion, or as a point on the treadle 39 havingrotary motion about the pivot bolt 31.

In operation, the coil to be formed consists generally of a round bundleof conductors held 3 together temporarily by light metal clips or bytapes. This bundle of wires is laid on the bottom plate and against theupturned flange l9 on the adjustable plate l8. Initially, the inclinedsurface 21 of the forming head 25 is above and some distance to theright (Figure 1), of the parallel inclined surface l3 of the body II].The slidable plate 15 is maintained in contact with the inclined surface2! of the forming head by the spring 16, this plate forming the supportfor the bottom of the coil. The operator grasps the coil at its ends inboth hands and forces the same against the upturned flange 29 on theslidable plate 28, forcing the latter upwardly. After the coil is inposition, the operator presses downwardly on the treadle 39. Theslidable 'p1ate 28 moves inwardly over the top of the coil and theupturned flange 29 on this plate abuts the upturned flange 19 on theadjustable plate l8. Further downward movement of the forming head 25will then compress the coil, both along the axis perpendicular to theslidable plates [5 and .28, and along the axis at right angles thereto,perpendicular to the upturned flanges I9 and 29 on the slidable platesl8 and 28, respectively. The relative position of the adjustable platel8 may be set by the adjusting screw '22 to determine the stage in thetravel of the forming head 25 at which transverse compression takesplace, and hence the thickness of the formed coil.

It will be apparent that the form of the invention herein described andillustrated is to be taken as the preferred embodiment of same, and thatvarious changes in the shape, size and arrangement of parts may be madewithout departing from the spirit of the invention as defined in theappended claims.

Having described my invention, what I claim as new and useful and desireto secure by Letters Patent of the United States is:

1. In a coil-forming press, a body having an inclined surface, a forminghead having an inclined surface parallel to said first-mentionedinclined surface, a spring-biased plate on said body at right angles tosaid inclined surface thereon, a spring-biased plate on said forminghead at right angles to the inclined surface thereon, and means forsimultaneously moving said inclined surfaces and said slidable platestoward each 1 other, thereby constricting the space between saidinclined surfaces and said slidable plates.

2. In a coil-forming press, a body having an inclined surface, anadjustable plate mounted on said body and having an upturned flangethereon disposed parallel to the inclined surface, a forming head havingan inclined surface disposed parallel to the inclined surface on thebody, a spring-biased plate on said body at right angles tosaid;inclined surface thereof and yieldably abutting the inclinedsurface on said forming head, a spring-biased plate on said forming head'at right angles to the inclined surface thereon andyieldably abuttingthe upturned flange on the adjustable plate, and means forsimultaneously moving the inclined surfaces and the springbiased plates.toward each other, thereby constricting the spac'ebetween saidspring-biased plates.

3. In a coil-forming press, a body having an inclined surface, anadjustable plate mounted on said body and having an upturnedflange'thereon disposed parallel to the inclined surface, a forming headhaving an inclined surface disposed parallel to the inclined surface onthe body, a spring-biased plate on said body at right angles to saidinclined surface thereon and yieldably abutting the inclined surface onthe forming head, a spring-biased plate on said forming head at rightangles to the inclined surface thereon and yieldably abutting theupturned flange on said adjustable plate, and means for simultaneouslymoving said inclined surfaces and springbiased plates toward each other,thereby constricting the space between said inclined surfaces on thebody and the forming head and between said spring-biased plates.

WORLEY GRANT ROYSTON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

